{
  "manageEntity": {
    "action": "Save",
    "entityId": "1490743042",
    "entityType": "Track",
    "nonce": "0x67b438c35c748c5b74900025a7dcd5db021ed2a54ef4330d87c39a2182073e12",
    "signature": "0xa3bf68af2c176b047c1a0f3bfcd122f52f8ae5bbfc4e1bba400192660f95b1895636bbf5ec03c21e816c25b8ac1737c5d01c86b14fc768c6be72f8281d3585051b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}